Add middleware to set Content-type to application/json on all API requests

app/Http/Kernel.php

@@ -37,6 +37,7 @@ class Kernel extends HttpKernel
         'api' => [
             'throttle:60,1',
             'bindings',
+            'json',
         ],
     ];
 
@@ -54,6 +55,7 @@ class Kernel extends HttpKernel
         'bindings' => \Illuminate\Routing\Middleware\SubstituteBindings::class,
         'can' => \Illuminate\Auth\Middleware\Authorize::class,
         'guest' => \App\Http\Middleware\RedirectIfAuthenticated::class,
+        'json' => \App\Http\Middleware\JsonResponse::class,
         'throttle' => \Illuminate\Routing\Middleware\ThrottleRequests::class,
         #'role' => \Laratrust\Middleware\LaratrustRole::class,
         #'permission' => \Laratrust\Middleware\LaratrustPermission::class,

app/Http/Middleware/JsonResponse.php

@@ -0,0 +1,18 @@
+<?php
+/**
+ * Set the content type in the API layer
+ */
+
+namespace App\Http\Middleware;
+
+use Closure;
+
+class JsonResponse
+{
+    public function handle($request, Closure $next)
+    {
+        $response = $next($request);
+        $response->headers->set('Content-Type', 'application/json');
+        return $response;
+    }
+}